From dc5ed3c75970d979a5bf030689c13e0cb3bee0f0 Mon Sep 17 00:00:00 2001
From: Yanick Champoux <yanick@babyl.dyndns.org>
Date: Mon, 4 Dec 2017 10:21:24 -0500
Subject: [PATCH] day4

---
 04/input.txt     | 512 +++++++++++++++++++++++++++++++++++++++++++++++
 04/passwords.pl  |   8 +
 04/passwords2.pl |  13 ++
 3 files changed, 533 insertions(+)
 create mode 100644 04/input.txt
 create mode 100644 04/passwords.pl
 create mode 100644 04/passwords2.pl

diff --git a/04/input.txt b/04/input.txt
new file mode 100644
index 0000000..943bb9a
--- /dev/null
+++ b/04/input.txt
@@ -0,0 +1,512 @@
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diff --git a/04/passwords.pl b/04/passwords.pl
new file mode 100644
index 0000000..fa511ee
--- /dev/null
+++ b/04/passwords.pl
@@ -0,0 +1,8 @@
+use 5.20.0;
+use List::AllUtils qw/ uniq sum /;
+
+say sum map {
+    my @u = uniq @$_;
+    @u == @$_;
+}
+map { chomp; [ split ] } <>;
diff --git a/04/passwords2.pl b/04/passwords2.pl
new file mode 100644
index 0000000..5f1d06d
--- /dev/null
+++ b/04/passwords2.pl
@@ -0,0 +1,13 @@
+use 5.20.0;
+use List::AllUtils qw/ uniq sum /;
+
+say sum map {
+    my @u = uniq @$_;
+    @u == @$_;
+}
+map { [ map { sortify($_) } @$_ ] }
+map { chomp; [ split ] } <>;
+
+sub sortify {
+    join '', sort split '', shift;
+}